feat(pycardium): Enable f-strings

Nobody noticed by MicroPython 1.17 brings f-strings.  Let's enable them!

pycardium/mpconfigport.h

@@ -53,6 +53,7 @@ int mp_hal_csprng_read_int(void);
 #define MICROPY_PY_IO_FILEIO                (1)
 #define MICROPY_PY_UERRNO                   (1)
 #define MICROPY_PY_FRAMEBUF                 (1)
+#define MICROPY_PY_FSTRINGS                 (1)
 #define MICROPY_PY_BLUETOOTH                (1)
 #define MICROPY_PY_BUILTINS_MEMORYVIEW      (1)
 #define MICROPY_PY_BLUETOOTH_ENABLE_CENTRAL_MODE (1)